Question

5. If A = 45°, B = 30°, then prove that
sin A/cos A+sin A sin B=2/3​

Answer 1

Answer:

Step-by-step explanation:

sinA=sin45=1/$\sqrt{2}$

cosA=cos45=1/$\sqrt{2}$

sinAsinB=sin45sin30=1/2$\sqrt{2}$

therefore,

sinA/cosA+sinAsinB =$\frac{1/\sqrt{2} }{1/\sqrt{2}+1/2\sqrt{2} }$  = $\frac{\frac{1}{\sqrt{2} } }{\frac{3}{2\sqrt{2} } }$ = $\frac{2}{3}$

HENCE PROVED

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Answer 2

Answer:

Mark the upper one as BRAINLIEST