cos510.cos330+sin390 .cos120=-1
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1lovesandhu2:
how 1/2 come
sin (360 + 30) = sin 30 = 1/2
Thanx
okk
ok sir. i will write
why like that
Answered by
8
Hey User .✋
Answer Of Your Question☺️
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cos510.cos330+sin390.cos120=-1
LHS,
cos510.cos330+sin390.cos120
→cos(90 × 5 + 60).cos(90 * 3 + 60) +sin(90×4+30).cos (90×1+30)
Finally,
→ -3/4 + (-1/4)
→ -1
RHS,
=-1 [Proved]
✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧
Hope My Answer Helped☺️☺️☺️☺️☺️
✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧
Answer Of Your Question☺️
✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧
cos510.cos330+sin390.cos120=-1
LHS,
cos510.cos330+sin390.cos120
→cos(90 × 5 + 60).cos(90 * 3 + 60) +sin(90×4+30).cos (90×1+30)
Finally,
→ -3/4 + (-1/4)
→ -1
RHS,
=-1 [Proved]
✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧
Hope My Answer Helped☺️☺️☺️☺️☺️
✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧✧
yeah , it's helped a lot , thanx
i just marked
why
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