Without using trigonometrical tables please prove the following sum.
I want the answer by tmrw morning.

Q. Prove without using

$\frac{\sin (90 - θ) . \sin θ}{\tan θ} - 1 \Rightarrow - \sin^{2} θ$

Question

Without using trigonometrical tables please prove the
following sum
I want the answer by tmrw morning

Q Prove without using

sin   90   - θ     sin   θ tan
  θ - 1 ⇒ –   sin 2 θ

Rishabh Mittal · Accepted Answer

Dear Student,

LHSsin 90-θ 
 sin θtan θ-1=cos θ sin θsin θcos θ - 1=cos2θ - 1=- sin2θ=RHSHence Proved

Regards

Without using trigonometrical tables please prove the following sum. I want the answer by tmrw morning. Q. Prove without using sin 90 - θ . sin θ tan θ - 1 ⇒ – sin 2 θ