91. The value of 152(sin30° + 2cos245° + 3sin30° + 4cos245° + ...... + 17sin30° + 18cos245°) is?
92. If $$x\sin {45^ \circ }$$ = $$y\operatorname{cosec} {30^ \circ },$$ then $$\frac{{{x^4}}}{{{y^4}}}$$ is equal to?
93. If tan2α = 1 + 2tan2β (α, β are positive acute angles), then √2cosα - cosβ is equal to?
94. If tanθ + cotθ = 2, then the value if tan100θ + cot100θ is?
95. The value of, $${\text{sec}}\theta \left( {\frac{{1 + \sin \theta }}{{{\text{cos}}\theta }} + \frac{{{\text{cos}}\theta }}{{1 + \sin \theta }}} \right)$$ - $$2{\text{ta}}{{\text{n}}^2}\theta $$ is?
96. If tanθ - cotθ = 0 find the value of sinθ + cosθ ?
97. If xsin60°.tan30° = sec60°.cot45° , then the value of x is?
98. If $$\frac{{2{{\tan }^2}{{30}^ \circ }}}{{1 - {{\tan }^2}{{30}^ \circ }}}$$ + $${\sec ^2}{45^ \circ }$$ - $${\sec ^2}{0^ \circ }$$ = $$x\sec {60^ \circ }{\text{,}}$$ then the value of x is?
99. If xsin60°.tan30° - tan245° = cosec60°.cot30° - sec245° then x = ?
100. The value of $$\frac{{{\text{co}}{{\text{s}}^2}{{60}^ \circ } + 4{\text{se}}{{\text{c}}^2}{{30}^ \circ } - {\text{ta}}{{\text{n}}^2}{{45}^ \circ }}}{{{{\sin }^2}{{30}^ \circ } + {\text{co}}{{\text{s}}^2}{{30}^ \circ }}}$$ is?
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