Find the value of θ (0° < θ < 90°) if :
cos 63° sec (90° - θ) = 1
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Given,
We know that,
cos A sec A = 1
∴ 90° - θ = 63°
⇒ θ = 90° - 63°
⇒ θ = 27°.
Hence, θ = 27°.
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Find the value of A if
tan 2A = cot (A - 18°), where 2A and A - 18° are acute angles.
If sec 2A = cosec (A - 27°) where 2A is an acute angle, find the measure of ∠A.
tan 35° cot (90° - θ) = 1.