131. If sec2A + tan2A = 3, then what is the value of cotA?
132. The value of 4sin230° + 3cot260° is:
133. The value of $$1 + \sqrt {\frac{{\cot \theta + \cos \theta }}{{\cot \theta - \cos \theta }}} ,$$ if 0° < θ < 90°, is equal to:
134. What is the value of 5sin260° + 7sin245°+ 8cos245°?
135. What is the value of $$\frac{{\cos {{40}^ \circ } - \cos {{140}^ \circ }}}{{\sin {{80}^ \circ } + \sin {{20}^ \circ }}}?$$
136. (sinθ + cosecθ)2 + (cosθ + secθ)2 - 1 = . . . . . . . .
137. If sec4θ = cosec(θ + 20°), then θ is equal to:
138. What is the value of the expression cos2Acos2B + sin2(A - B) - sin2(A + B)?
139. The value of $$\frac{{\left( {\cos {9^ \circ } + \sin {{81}^ \circ }} \right)\left( {\sec {9^ \circ } + {\text{cosec}}\,{{81}^ \circ }} \right)}}{{\sin {{56}^ \circ }\sec {{34}^ \circ } + \cos {{25}^ \circ }{\text{cosec}}\,{{65}^ \circ }}}{\text{ is:}}$$
140. If 7sin2θ + 4cos2θ = 5 and θ lies in the first quadrant, then what is the value of $$\frac{{\sqrt 3 \sec \theta + \tan \theta }}{{\sqrt 2 \cot \theta - \sqrt 3 \cos \theta }}?$$
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