Question

evaluate - ( sin 90°+cos45°+cos60°)(cos0°-sin45°+sin30°)

Answer 1

Yo Mate ✌️

Here's Your Answer!!

• sin90°=1
• cos45°=1/√2
• cos60°=1/2
• cos0°=1
• sin45°=1/√2
• sin30°=1/2

Now We can Put These Values

[1+(1/√2)+(1/2)][1-(1/√2)+(1/2)]

=[2√2+2+√2][2√2-2+√2] LCM=2√2

2√2 2√2

=[3√2+2]*[3√2-2]

2√2 2√2

=(3√2)²-2²/4*√2*√2

=(9*2)-4/8

=18-4/8

=14/8

7/4

Hope That's Correct

Thank you

Regards ✌️